That first month of the season went awfully fast. It was barely here, and then it was gone. Although we suppose that is what happens when the league starts the season a full week into April, rather than starting at the beginning of the month and saving the week of World Series games in November.Never mind. That's another rant for another day.For now, join us as we look back with instant nostalgia at the opening weeks of the season, and study the lessons to be learned from April 2010.The Jays Offense, or why OPS was inventedThrough this weekend's games, the Jays sit in dead last in the American League in on base, with a skimpy .303 mark. On the other hand, the Jays sit just behind the Yankees in team slugging percentage, hammering the ball at a rugged .453 clip. Toss those two marks...

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